/Engine/Source/Runtime/NavigationSystem/Public/NavigationPath.h
If enabled path will request recalculation if it gets invalidated due to a change to underlying navigation
void EnableRecalculationOnInvalidation ( [TEnumAsByte](API\Runtime\Core\Containers\TEnumAsByte)< [ENavigationOptionFlag::Type](API\Runtime\Engine\AI\Navigation\ENavigationOptionFlag__Type) > DoRecalculation )